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Biology with MasteringBiology™ (8th Edition)

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Unformatted text preview: MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Alpha particles (charge = + 2e, mass = 6.68 kg) are accelerated in a cyclotron to a final orbit radius of The magnetic field in the cyclotron is The period of circular motion of the alpha particles is closest to: 1) _______ A) . 49 s 0. 40 s 0.33 s D) 0.16 s E) 0.25 s 2) Alpha particles (charge = + 2e, mass = 6.68 kg) are accelerated in a cyclotron to a final orbit radius of The magnetic field in the cyclotron is The kinetic energy of an alpha particle in the final orbit is closest to: 2) _______ A) 4 . 3 M eV 3. 4 MeV 3.9 MeV D) 2.6 MeV E) 3.0 MeV 3) An electron enters a magnetic field of with a velocity perpendicula r to the direction of the field. At what frequency does the electron traverse a circular path? (The mass of an electron is and the charge of an electron is 3) _______ A) 2.1 10 10 Hz B) 4.8 1 4.8 10- 11 Hz D) 2.1 1 4 ) An electron in a magnetic field has a cyclotron frequency of What is the magnetic field strength? (The mass of an electron is and the charge of an electron is 4) _______ A) 0.0035 T B) 4.5 T C) 0.22 T D) 29 0 A uniform magnetic field of magnitude 0.80 T in the negative z- direction is present in a region of space. A uniform electric field is also present. In the figure, the electric field is set at 20,800 V/m in the positive y- direction. An electron is projected with an initial velocity in the positive x- direction. The of the initial force on the electron is closest to: 5) _______ A) - 3 N - 7 N + 3 N D) + 7 N E) zero A mass spectrograph is operated with deuterons, which have a charge of + e and a mass of Deuterons emerge from the source, which is grounded with negligible velocity. The velocity of the deuterons as they pass through the accelerator grid is A uniform magnetic field of magnitude directed out of the plane, is present at the right of the grid. 6) In the figure , the deuterons are in circular orbit in the magnetic field. The radius of the orbit and the initial sense of deflection are closest to: 6) _______ A) 7 m m, up wa rd 6 0 mm, upward 80 mm, downward D) 60 mm, downward E) 70 mm, downward 7) A rigid rectangular loop, which measures 0.30 m by 0....
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24 - MULTIPLE CHOICE. Choose the one alternative that best...

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